3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/common.h"
26 #include "libavutil/eval.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/rational.h"
31 #include "libavutil/samplefmt.h"
39 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
41 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
43 av_unused char buf[16];
45 "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
46 ref, ref->buf, ref->data[0],
47 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
48 ref->pts, av_frame_get_pkt_pos(ref));
51 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
52 ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
53 ref->width, ref->height,
54 !ref->interlaced_frame ? 'P' : /* Progressive */
55 ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
57 av_get_picture_type_char(ref->pict_type));
59 if (ref->nb_samples) {
60 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
66 ff_tlog(ctx, "]%s", end ? "\n" : "");
69 unsigned avfilter_version(void)
71 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
72 return LIBAVFILTER_VERSION_INT;
75 const char *avfilter_configuration(void)
77 return FFMPEG_CONFIGURATION;
80 const char *avfilter_license(void)
82 #define LICENSE_PREFIX "libavfilter license: "
83 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
86 void ff_command_queue_pop(AVFilterContext *filter)
88 AVFilterCommand *c= filter->command_queue;
90 av_freep(&c->command);
91 filter->command_queue= c->next;
95 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
96 AVFilterPad **pads, AVFilterLink ***links,
101 idx = FFMIN(idx, *count);
103 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
104 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
105 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
106 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
107 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
108 (*links)[idx] = NULL;
111 for (i = idx + 1; i < *count; i++)
113 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
116 int avfilter_link(AVFilterContext *src, unsigned srcpad,
117 AVFilterContext *dst, unsigned dstpad)
121 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
122 src->outputs[srcpad] || dst->inputs[dstpad])
125 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
126 av_log(src, AV_LOG_ERROR,
127 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
128 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
129 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
130 return AVERROR(EINVAL);
133 link = av_mallocz(sizeof(*link));
135 return AVERROR(ENOMEM);
137 src->outputs[srcpad] = dst->inputs[dstpad] = link;
141 link->srcpad = &src->output_pads[srcpad];
142 link->dstpad = &dst->input_pads[dstpad];
143 link->type = src->output_pads[srcpad].type;
144 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
150 void avfilter_link_free(AVFilterLink **link)
155 av_frame_free(&(*link)->partial_buf);
160 int avfilter_link_get_channels(AVFilterLink *link)
162 return link->channels;
165 void avfilter_link_set_closed(AVFilterLink *link, int closed)
167 link->closed = closed;
170 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
171 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
174 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
176 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
177 "between the filter '%s' and the filter '%s'\n",
178 filt->name, link->src->name, link->dst->name);
180 link->dst->inputs[dstpad_idx] = NULL;
181 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
182 /* failed to link output filter to new filter */
183 link->dst->inputs[dstpad_idx] = link;
187 /* re-hookup the link to the new destination filter we inserted */
189 link->dstpad = &filt->input_pads[filt_srcpad_idx];
190 filt->inputs[filt_srcpad_idx] = link;
192 /* if any information on supported media formats already exists on the
193 * link, we need to preserve that */
194 if (link->out_formats)
195 ff_formats_changeref(&link->out_formats,
196 &filt->outputs[filt_dstpad_idx]->out_formats);
197 if (link->out_samplerates)
198 ff_formats_changeref(&link->out_samplerates,
199 &filt->outputs[filt_dstpad_idx]->out_samplerates);
200 if (link->out_channel_layouts)
201 ff_channel_layouts_changeref(&link->out_channel_layouts,
202 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
207 int avfilter_config_links(AVFilterContext *filter)
209 int (*config_link)(AVFilterLink *);
213 for (i = 0; i < filter->nb_inputs; i ++) {
214 AVFilterLink *link = filter->inputs[i];
215 AVFilterLink *inlink;
219 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
220 link->current_pts = AV_NOPTS_VALUE;
222 switch (link->init_state) {
225 case AVLINK_STARTINIT:
226 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
229 link->init_state = AVLINK_STARTINIT;
231 if ((ret = avfilter_config_links(link->src)) < 0)
234 if (!(config_link = link->srcpad->config_props)) {
235 if (link->src->nb_inputs != 1) {
236 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
237 "with more than one input "
238 "must set config_props() "
239 "callbacks on all outputs\n");
240 return AVERROR(EINVAL);
242 } else if ((ret = config_link(link)) < 0) {
243 av_log(link->src, AV_LOG_ERROR,
244 "Failed to configure output pad on %s\n",
249 switch (link->type) {
250 case AVMEDIA_TYPE_VIDEO:
251 if (!link->time_base.num && !link->time_base.den)
252 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
254 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
255 link->sample_aspect_ratio = inlink ?
256 inlink->sample_aspect_ratio : (AVRational){1,1};
258 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
259 link->frame_rate = inlink->frame_rate;
266 } else if (!link->w || !link->h) {
267 av_log(link->src, AV_LOG_ERROR,
268 "Video source filters must set their output link's "
269 "width and height\n");
270 return AVERROR(EINVAL);
274 case AVMEDIA_TYPE_AUDIO:
276 if (!link->time_base.num && !link->time_base.den)
277 link->time_base = inlink->time_base;
280 if (!link->time_base.num && !link->time_base.den)
281 link->time_base = (AVRational) {1, link->sample_rate};
284 if ((config_link = link->dstpad->config_props))
285 if ((ret = config_link(link)) < 0) {
286 av_log(link->src, AV_LOG_ERROR,
287 "Failed to configure input pad on %s\n",
292 link->init_state = AVLINK_INIT;
299 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
301 if (link->type == AVMEDIA_TYPE_VIDEO) {
303 "link[%p s:%dx%d fmt:%s %s->%s]%s",
304 link, link->w, link->h,
305 av_get_pix_fmt_name(link->format),
306 link->src ? link->src->filter->name : "",
307 link->dst ? link->dst->filter->name : "",
311 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
314 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
315 link, (int)link->sample_rate, buf,
316 av_get_sample_fmt_name(link->format),
317 link->src ? link->src->filter->name : "",
318 link->dst ? link->dst->filter->name : "",
323 int ff_request_frame(AVFilterLink *link)
326 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
330 av_assert0(!link->frame_requested);
331 link->frame_requested = 1;
332 while (link->frame_requested) {
333 if (link->srcpad->request_frame)
334 ret = link->srcpad->request_frame(link);
335 else if (link->src->inputs[0])
336 ret = ff_request_frame(link->src->inputs[0]);
337 if (ret == AVERROR_EOF && link->partial_buf) {
338 AVFrame *pbuf = link->partial_buf;
339 link->partial_buf = NULL;
340 ret = ff_filter_frame_framed(link, pbuf);
343 link->frame_requested = 0;
344 if (ret == AVERROR_EOF)
347 av_assert0(!link->frame_requested ||
348 link->flags & FF_LINK_FLAG_REQUEST_LOOP);
354 int ff_poll_frame(AVFilterLink *link)
356 int i, min = INT_MAX;
358 if (link->srcpad->poll_frame)
359 return link->srcpad->poll_frame(link);
361 for (i = 0; i < link->src->nb_inputs; i++) {
363 if (!link->src->inputs[i])
365 val = ff_poll_frame(link->src->inputs[i]);
366 min = FFMIN(min, val);
372 static const char *const var_names[] = { "t", "n", "pos", NULL };
373 enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB };
375 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
379 AVExpr *old = ctx->enable;
381 if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
382 av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
383 "with filter '%s'\n", ctx->filter->name);
384 return AVERROR_PATCHWELCOME;
387 expr_dup = av_strdup(expr);
389 return AVERROR(ENOMEM);
391 if (!ctx->var_values) {
392 ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
393 if (!ctx->var_values) {
395 return AVERROR(ENOMEM);
399 ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
400 NULL, NULL, NULL, NULL, 0, ctx->priv);
402 av_log(ctx->priv, AV_LOG_ERROR,
403 "Error when evaluating the expression '%s' for enable\n",
410 av_free(ctx->enable_str);
411 ctx->enable_str = expr_dup;
415 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
417 if (pts == AV_NOPTS_VALUE)
419 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
420 /* TODO use duration */
421 if (link->graph && link->age_index >= 0)
422 ff_avfilter_graph_update_heap(link->graph, link);
425 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
427 if(!strcmp(cmd, "ping")){
428 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
430 }else if(!strcmp(cmd, "enable")) {
431 return set_enable_expr(filter, arg);
432 }else if(filter->filter->process_command) {
433 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
435 return AVERROR(ENOSYS);
438 static AVFilter *first_filter;
440 AVFilter *avfilter_get_by_name(const char *name)
442 const AVFilter *f = NULL;
447 while ((f = avfilter_next(f)))
448 if (!strcmp(f->name, name))
449 return (AVFilter *)f;
454 int avfilter_register(AVFilter *filter)
456 AVFilter **f = &first_filter;
459 /* the filter must select generic or internal exclusively */
460 av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
462 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
463 const AVFilterPad *input = &filter->inputs[i];
464 av_assert0( !input->filter_frame
465 || (!input->start_frame && !input->end_frame));
476 const AVFilter *avfilter_next(const AVFilter *prev)
478 return prev ? prev->next : first_filter;
481 #if FF_API_OLD_FILTER_REGISTER
482 AVFilter **av_filter_next(AVFilter **filter)
484 return filter ? &(*filter)->next : &first_filter;
487 void avfilter_uninit(void)
492 int avfilter_pad_count(const AVFilterPad *pads)
499 for (count = 0; pads->name; count++)
504 static const char *default_filter_name(void *filter_ctx)
506 AVFilterContext *ctx = filter_ctx;
507 return ctx->name ? ctx->name : ctx->filter->name;
510 static void *filter_child_next(void *obj, void *prev)
512 AVFilterContext *ctx = obj;
513 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
518 static const AVClass *filter_child_class_next(const AVClass *prev)
520 const AVFilter *f = NULL;
522 /* find the filter that corresponds to prev */
523 while (prev && (f = avfilter_next(f)))
524 if (f->priv_class == prev)
527 /* could not find filter corresponding to prev */
531 /* find next filter with specific options */
532 while ((f = avfilter_next(f)))
534 return f->priv_class;
539 #define OFFSET(x) offsetof(AVFilterContext, x)
540 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
541 static const AVOption options[] = {
542 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
543 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
544 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
545 { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
549 static const AVClass avfilter_class = {
550 .class_name = "AVFilter",
551 .item_name = default_filter_name,
552 .version = LIBAVUTIL_VERSION_INT,
553 .category = AV_CLASS_CATEGORY_FILTER,
554 .child_next = filter_child_next,
555 .child_class_next = filter_child_class_next,
559 static int default_execute(AVFilterContext *ctx, action_func *func, void *arg,
560 int *ret, int nb_jobs)
564 for (i = 0; i < nb_jobs; i++) {
565 int r = func(ctx, arg, i, nb_jobs);
572 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
574 AVFilterContext *ret;
579 ret = av_mallocz(sizeof(AVFilterContext));
583 ret->av_class = &avfilter_class;
584 ret->filter = filter;
585 ret->name = inst_name ? av_strdup(inst_name) : NULL;
586 if (filter->priv_size) {
587 ret->priv = av_mallocz(filter->priv_size);
592 av_opt_set_defaults(ret);
593 if (filter->priv_class) {
594 *(const AVClass**)ret->priv = filter->priv_class;
595 av_opt_set_defaults(ret->priv);
598 ret->internal = av_mallocz(sizeof(*ret->internal));
601 ret->internal->execute = default_execute;
603 ret->nb_inputs = avfilter_pad_count(filter->inputs);
604 if (ret->nb_inputs ) {
605 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
606 if (!ret->input_pads)
608 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
609 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
614 ret->nb_outputs = avfilter_pad_count(filter->outputs);
615 if (ret->nb_outputs) {
616 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
617 if (!ret->output_pads)
619 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
620 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
625 ret->output_count = ret->nb_outputs;
626 ret->input_count = ret->nb_inputs;
632 av_freep(&ret->inputs);
633 av_freep(&ret->input_pads);
635 av_freep(&ret->outputs);
636 av_freep(&ret->output_pads);
638 av_freep(&ret->priv);
639 av_freep(&ret->internal);
644 #if FF_API_AVFILTER_OPEN
645 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
647 *filter_ctx = ff_filter_alloc(filter, inst_name);
648 return *filter_ctx ? 0 : AVERROR(ENOMEM);
652 static void free_link(AVFilterLink *link)
658 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
660 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
662 ff_formats_unref(&link->in_formats);
663 ff_formats_unref(&link->out_formats);
664 ff_formats_unref(&link->in_samplerates);
665 ff_formats_unref(&link->out_samplerates);
666 ff_channel_layouts_unref(&link->in_channel_layouts);
667 ff_channel_layouts_unref(&link->out_channel_layouts);
668 avfilter_link_free(&link);
671 void avfilter_free(AVFilterContext *filter)
679 ff_filter_graph_remove_filter(filter->graph, filter);
681 if (filter->filter->uninit)
682 filter->filter->uninit(filter);
684 for (i = 0; i < filter->nb_inputs; i++) {
685 free_link(filter->inputs[i]);
687 for (i = 0; i < filter->nb_outputs; i++) {
688 free_link(filter->outputs[i]);
691 if (filter->filter->priv_class)
692 av_opt_free(filter->priv);
694 av_freep(&filter->name);
695 av_freep(&filter->input_pads);
696 av_freep(&filter->output_pads);
697 av_freep(&filter->inputs);
698 av_freep(&filter->outputs);
699 av_freep(&filter->priv);
700 while(filter->command_queue){
701 ff_command_queue_pop(filter);
704 av_expr_free(filter->enable);
705 filter->enable = NULL;
706 av_freep(&filter->var_values);
707 av_freep(&filter->internal);
711 static int process_options(AVFilterContext *ctx, AVDictionary **options,
714 const AVOption *o = NULL;
716 char *av_uninit(parsed_key), *av_uninit(value);
724 const char *shorthand = NULL;
726 o = av_opt_next(ctx->priv, o);
728 if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
734 ret = av_opt_get_key_value(&args, "=", ":",
735 shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
736 &parsed_key, &value);
738 if (ret == AVERROR(EINVAL))
739 av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
741 av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
749 while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
754 av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
756 if (av_opt_find(ctx, key, NULL, 0, 0)) {
757 ret = av_opt_set(ctx, key, value, 0);
764 av_dict_set(options, key, value, 0);
765 if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
766 if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
767 if (ret == AVERROR_OPTION_NOT_FOUND)
768 av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
781 if (ctx->enable_str) {
782 ret = set_enable_expr(ctx, ctx->enable_str);
789 #if FF_API_AVFILTER_INIT_FILTER
790 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
792 return avfilter_init_str(filter, args);
796 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
800 ret = av_opt_set_dict(ctx, options);
802 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
806 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
807 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
808 ctx->graph->internal->thread_execute) {
809 ctx->thread_type = AVFILTER_THREAD_SLICE;
810 ctx->internal->execute = ctx->graph->internal->thread_execute;
812 ctx->thread_type = 0;
815 if (ctx->filter->priv_class) {
816 ret = av_opt_set_dict(ctx->priv, options);
818 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
823 if (ctx->filter->init_opaque)
824 ret = ctx->filter->init_opaque(ctx, NULL);
825 else if (ctx->filter->init)
826 ret = ctx->filter->init(ctx);
827 else if (ctx->filter->init_dict)
828 ret = ctx->filter->init_dict(ctx, options);
833 int avfilter_init_str(AVFilterContext *filter, const char *args)
835 AVDictionary *options = NULL;
836 AVDictionaryEntry *e;
840 if (!filter->filter->priv_class) {
841 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
842 "options, but options were provided: %s.\n", args);
843 return AVERROR(EINVAL);
846 #if FF_API_OLD_FILTER_OPTS
847 if ( !strcmp(filter->filter->name, "format") ||
848 !strcmp(filter->filter->name, "noformat") ||
849 !strcmp(filter->filter->name, "frei0r") ||
850 !strcmp(filter->filter->name, "frei0r_src") ||
851 !strcmp(filter->filter->name, "ocv") ||
852 !strcmp(filter->filter->name, "pan") ||
853 !strcmp(filter->filter->name, "pp") ||
854 !strcmp(filter->filter->name, "aevalsrc")) {
855 /* a hack for compatibility with the old syntax
856 * replace colons with |s */
857 char *copy = av_strdup(args);
859 int nb_leading = 0; // number of leading colons to skip
863 ret = AVERROR(ENOMEM);
867 if (!strcmp(filter->filter->name, "frei0r") ||
868 !strcmp(filter->filter->name, "ocv"))
870 else if (!strcmp(filter->filter->name, "frei0r_src"))
873 while (nb_leading--) {
876 p = copy + strlen(copy);
882 deprecated = strchr(p, ':') != NULL;
884 if (!strcmp(filter->filter->name, "aevalsrc")) {
886 while ((p = strchr(p, ':')) && p[1] != ':') {
887 const char *epos = strchr(p + 1, '=');
888 const char *spos = strchr(p + 1, ':');
889 const int next_token_is_opt = epos && (!spos || epos < spos);
890 if (next_token_is_opt) {
894 /* next token does not contain a '=', assume a channel expression */
898 if (p && *p == ':') { // double sep '::' found
900 memmove(p, p + 1, strlen(p));
903 while ((p = strchr(p, ':')))
907 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
908 "'|' to separate the list items.\n");
910 av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
911 ret = process_options(filter, &options, copy);
919 if (!strcmp(filter->filter->name, "mp")) {
922 if (!strncmp(args, "filter=", 7))
924 ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
926 av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
929 ret = process_options(filter, &options, escaped);
933 ret = process_options(filter, &options, args);
939 ret = avfilter_init_dict(filter, &options);
943 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
944 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
945 ret = AVERROR_OPTION_NOT_FOUND;
950 av_dict_free(&options);
955 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
957 return pads[pad_idx].name;
960 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
962 return pads[pad_idx].type;
965 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
967 return ff_filter_frame(link->dst->outputs[0], frame);
970 static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
972 int (*filter_frame)(AVFilterLink *, AVFrame *);
973 AVFilterContext *dstctx = link->dst;
974 AVFilterPad *dst = link->dstpad;
977 AVFilterCommand *cmd= link->dst->command_queue;
981 av_frame_free(&frame);
985 if (!(filter_frame = dst->filter_frame))
986 filter_frame = default_filter_frame;
988 /* copy the frame if needed */
989 if (dst->needs_writable && !av_frame_is_writable(frame)) {
990 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
992 /* Maybe use ff_copy_buffer_ref instead? */
993 switch (link->type) {
994 case AVMEDIA_TYPE_VIDEO:
995 out = ff_get_video_buffer(link, link->w, link->h);
997 case AVMEDIA_TYPE_AUDIO:
998 out = ff_get_audio_buffer(link, frame->nb_samples);
1000 default: return AVERROR(EINVAL);
1003 av_frame_free(&frame);
1004 return AVERROR(ENOMEM);
1006 av_frame_copy_props(out, frame);
1008 switch (link->type) {
1009 case AVMEDIA_TYPE_VIDEO:
1010 av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1011 frame->format, frame->width, frame->height);
1013 case AVMEDIA_TYPE_AUDIO:
1014 av_samples_copy(out->extended_data, frame->extended_data,
1015 0, 0, frame->nb_samples,
1016 av_get_channel_layout_nb_channels(frame->channel_layout),
1019 default: return AVERROR(EINVAL);
1022 av_frame_free(&frame);
1026 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1027 av_log(link->dst, AV_LOG_DEBUG,
1028 "Processing command time:%f command:%s arg:%s\n",
1029 cmd->time, cmd->command, cmd->arg);
1030 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1031 ff_command_queue_pop(link->dst);
1032 cmd= link->dst->command_queue;
1036 if (dstctx->enable_str) {
1037 int64_t pos = av_frame_get_pkt_pos(out);
1038 dstctx->var_values[VAR_N] = link->frame_count;
1039 dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1040 dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1042 dstctx->is_disabled = !av_expr_eval(dstctx->enable, dstctx->var_values, NULL);
1043 if (dstctx->is_disabled &&
1044 (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
1045 filter_frame = default_filter_frame;
1047 ret = filter_frame(link, out);
1048 link->frame_count++;
1049 link->frame_requested = 0;
1050 ff_update_link_current_pts(link, pts);
1054 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
1056 int insamples = frame->nb_samples, inpos = 0, nb_samples;
1057 AVFrame *pbuf = link->partial_buf;
1058 int nb_channels = av_frame_get_channels(frame);
1061 link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
1062 /* Handle framing (min_samples, max_samples) */
1065 AVRational samples_tb = { 1, link->sample_rate };
1066 pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1068 av_log(link->dst, AV_LOG_WARNING,
1069 "Samples dropped due to memory allocation failure.\n");
1072 av_frame_copy_props(pbuf, frame);
1073 pbuf->pts = frame->pts +
1074 av_rescale_q(inpos, samples_tb, link->time_base);
1075 pbuf->nb_samples = 0;
1077 nb_samples = FFMIN(insamples,
1078 link->partial_buf_size - pbuf->nb_samples);
1079 av_samples_copy(pbuf->extended_data, frame->extended_data,
1080 pbuf->nb_samples, inpos,
1081 nb_samples, nb_channels, link->format);
1082 inpos += nb_samples;
1083 insamples -= nb_samples;
1084 pbuf->nb_samples += nb_samples;
1085 if (pbuf->nb_samples >= link->min_samples) {
1086 ret = ff_filter_frame_framed(link, pbuf);
1090 av_frame_free(&frame);
1091 link->partial_buf = pbuf;
1095 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
1097 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1099 /* Consistency checks */
1100 if (link->type == AVMEDIA_TYPE_VIDEO) {
1101 if (strcmp(link->dst->filter->name, "scale")) {
1102 av_assert1(frame->format == link->format);
1103 av_assert1(frame->width == link->w);
1104 av_assert1(frame->height == link->h);
1107 av_assert1(frame->format == link->format);
1108 av_assert1(av_frame_get_channels(frame) == link->channels);
1109 av_assert1(frame->channel_layout == link->channel_layout);
1110 av_assert1(frame->sample_rate == link->sample_rate);
1113 /* Go directly to actual filtering if possible */
1114 if (link->type == AVMEDIA_TYPE_AUDIO &&
1115 link->min_samples &&
1116 (link->partial_buf ||
1117 frame->nb_samples < link->min_samples ||
1118 frame->nb_samples > link->max_samples)) {
1119 return ff_filter_frame_needs_framing(link, frame);
1121 return ff_filter_frame_framed(link, frame);
1125 const AVClass *avfilter_get_class(void)
1127 return &avfilter_class;